CNN Erin Burnett OutFront December 23, 2014 00:55:00
Fighters. you are prisoners here and we'll trade you back for fighters. >> reporter: he says people living in isis-controlled areas are the fear of the harsh penalties for infringement of the stringent laws, but there's also a sense of order and stability. according to him, fighters say they often manage to defeat much larger armies like the iraqi military because they're not afraid to die. how many days to conquer mosul? four days. >> translator: we didn't kill 24, but we killed a score of them, so they got terrified and ran away. we don't retreat. we only fight and god almighty will victor u...